While the main Bloodstained game was a tribute to the Metroidvanias, Bloodstained: Curse Of The Moon more resembles the old Castlevania games, right down to aping Castlevania III: Dracula’s Curse’s character swapping. But a long time has passed since Castlevania III came out in 1989, and I think enough refinements have been made that mean Curse Of The Moon is distinct enough.